Organizers have decided to postpone a rally in solidarity for the victims of Tuesday's terror attacks in Brussels at the request of Belgium's interior minister, who said police are stretched too thin due to the ongoing investigation into the bombings.

Interior Minister Jan Jambon made his appeal on Belgian television, urging but not demanding organizers of the "March against Fear" demonstration planned for Sunday to cancel it over security concerns.

"We understand fully the emotions. We understand that everyone wants to express these feelings," Jambon said.

The march was to take place from the Place de la Bourse in Brussels to the city's Gare du Nord.

Belgium remains on high alert after least 31 people were killed and 270 wounded in twin attacks on Brussels airport and metro that occurred about one hour apart early Tuesday morning local time.

Organizers said the march was meant to show that Belgians refuse to be intimidated by terrorism and that they are united.

Police check vehicles on approach to France's Toulouse Blagnac airport. Security has been reinforced in European airports since attacks in Paris and Brussels.

Image: SIMON DECLEVES/Sipa via AP Images

"This week, we, Belgian citizens have been attacked, in how we live, our customs, our rights, our liberty," read a statement from organizers, according to AFP. "The first reaction in such events is to withdraw but on reflection, fear must give way to hope and the defense of our values."

But in the end, they decided to cancel the event.

Charges filed against three suspects

Meanwhile, Belgian prosecutors say three men have been charged with terrorist offenses linked to Tuesday's attacks.

Federal prosecutors announced Saturday they charged a man identified as Faycal C. for "involvement in a terrorist group, terrorist murder and attempted terrorist murder," The Associated Press reported. They say he was arrested Thursday. No weapons or explosives were uncovered during a police raid on his home.

Prosecutors didn't comment on Belgian media reports that a man named Faycal Cheffou has been identified as the suspected fugitive in a light-colored jacket who fled Brussels airport after two alleged accomplices blew themselves up there Tuesday.

The Belgian Le Soir news outlet said a taxi driver who drove the three men to the airport identified Cheffou as one of his passengers from photographs.

Image: FEDERAL POLICE/PHOTO NEWS S.A./CORBIS

Prosecutors say two other suspects arrested Thursday and identified as Rabah N. and Aboubakar A. have been charged with "involvement in the activities of a terrorist group."

A fourth man, taken into custody Friday after he was shot by police at a Brussels tram stop, is being held for at least 24 hours longer.

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